Later JARIC also produced fix point overlays for the TSR2 SLAR. These were masterpieces of modelling. Fabrics, pipe cleaners etc were manipulated and then oblique photographs taken to give as accurate an impression of a SLAR fix-point image. If you think about it, this was the ultimate inflexible navigation aid.
A bit like the old Ecko 190 Radar predictions for the Dominie then.
